Photographic-printing machine



Jan. 30, 1923.

M WELSH PHOTOGRAPH l C PR N 1 NG MACH NE 4 SHEETS-SHEET 1 FILED APR. 23,\920.

Jan. 30, 1923.

M. WELSH. PHOTOGRAFHIC PRlNTING MACHINE.

4 SHEETS'SHEET 3 FILED APE-1.23, 1920 qghtvwoo Jan. 30, 1923. 1,443,403Mv WELSH PHOTOGRAPHI c PRINT I NC; MACHINE Fl LED APR. 23 1920 4SHEETS'SHEET 4 Patented Jan. 30, 1923.

PATENT OFFICE.

MONTE WELSH, OF SAN ANTONIO, TEXAS.

PHOTOGRAPHIG-PRINTING MACHINE.

Application filed April 23, 1920. Serial No. 376,037.

[0 all whom it may concern:

' Be'it known that I, MONTE \VnLsir, a citizen of the United States,residing at San Antonio, in the county of Bexar and State of Texas, haveinvented a new and useful Photographic-Frinting Machine, of which thefollowing is a specification.

The device forming the subject matter of this application is aphotographic printing apparatus, of that general form shown in my priorPatent No. 1,186,719, granted on the 13th dayof June, 1916.

The device forming the subject matter of this application contemplatesgeneral improvements in the structure shown in my former patent, theseimprovements being made manifest as the description is proceed ed with.

Specifically, one object of the invention is to provide novel means forpressing the mask against the film or negative.

Another object of the invention is to provide novel means whereby thefilm may be. raised and lowered, so that the film will cooperate withthe opening in the mask.

A further object of the invention is to provide novel means foroperating and controlling a ground glass which serves to diffuse thelight.

A further object of the invention is to provide novel means foroperating the switch which controls the current to the lamp.

The invention aims, further, as above intima-ted, to improve generallyand to enhance the utility of devices of that type hereinafterdescribed.

WVith the above and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, itbeing understood that. within the scope of whatis claimed. changes in the precise embodiment of the invention shown canbe made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side eleva tion, a deviceconstructed in accordance with the invention. parts being broken awayand parts appearing in section; Figure 2 is atop plan of the machine;Figure 3 is an end elevation: Figure 4 is a sectional detail showingprcsser block which is carried by one of the hinged leads; Figure 5 isan elevation showing in detail, parts of the paper holding mecha nism;Figure 6 is an elevation looking at the negative support, parts of thedevice having been removed; Figure 7 is a. sectional detail showing aportion of the means whereby the film is guided and controlled, the viewdepicting the relation existing between the mask, the film and thepanel; Figure 8 is a detail showing the switch; Figure 9 is a fragmentalvertical section, parts being omitted and broken away; and Figure 10 isa fragmental elevation showing a portion of the paper holding means.

In the drawing, there appears a base 1, carrying an upstanding negativeholder 2 in the form of a plate or board having an opening 3. A recess 4is formed in the holder 2 about the opening?) and in the recess, a panel5, preferably a glass plate, is seated, the panel being held in place bybuttons 6 on the holder 2. Spring arms 7 are attached at 8 to the base 1and tend to press against the holder 2. Studs 23 are mounted in the arms7 and extend slidably through the negative holder 2, nuts 2st beingmounted on the studs, and compression springs 25 being interposedbetween the nuts and the holder 2. The tendency of the springs 25,obviously, is to draw the arms 7 toward the holder 2, it being possibleto adjust the effort of the springs 25, by rotating the nuts 24.Referring to Figure 7 it will be observed that the arms, 7 are suppliedwith guides 9 disposed adjacent to the negative holder 2. The arms 7 areprovided with vertical sockets 12 adapted to receive beads 11 on theedges of a mask 10, the beads being inserted downwardly into thesockets. The numeral 14 denotes a film, passing across the guides 9 andextended between the mask 10 and the panel 5.

A means is provided whereby the film 1 1;

may be raised and lowered, to locate the film .properly with respect tothe opening 35 in the mask 10. With this end in view, guide plates 15are attached to the edges of the negative holder 2 by securing elements16, slides 17 being mounted to reciprocate between. the guide plates 15and the edges of the negative holder, the slides having elongated slots,wherein the securing elements 16 are received. The slides 17 havingprojecting hook-shaped brackets 19 and are supplied with racks 2'0meshing into pinions 21 carried. by a shaft 22 mounted to rotate on thenegative holder Q'and supplied with a knob 26 whereby the shaft may bemanipulated conveniently.

It will be understood that when the shaft 22 is rotated by means of theknob 26, the pinions 21 cooperating with the racks 20, will raise orlower the slides 17, the brackets 19 carrying the film 14c upwardly anddownwardly, and locating the film properly with regard to the opening inthe mask 10.

One improvement contemplated in this application, is the provision ofmeans whereby the mask 10 may be pressed against the film 14. The meansabove alluded to comprises a pair of bearing brackets 27 mounted on theholder 2, a shaft 28 being journaled in the brackets. A loop-shapedspring 29 is carried by the shaft 28 and supportsa, presser arm 30,adapted to engage the mask 10. A latch 31 is mounted on the negativeholder 2 and is supplied with a seat 32 adapted to engage a crank 33 atone end of the shaft 28, the other end of the shaft being supplied witha crank 34:.

In operation. rotation may be imparted. to the shaft '28 through theinstrumentality of the crank 34:. the member 30 being pressed againstthe mask 10 and the spring 29 being put under tension. -When the shaft-28 is rotated as aforesaid, the crank 33 inter locks with the seat 32 ofthe latch 31 and thus the member 30 is held yieldingly but firmlyagainst the mask 10 so as to press the mask against the film lat and tohold the film between the mask and the transparent panel As in my priorpatent hereinbefore mentioned, a main leaf 36 is hinged at 37 to thebase 1, an auxiliary leaf 38 being hinged at 39 to the upper edge of themain leaf 36. A shaft 40 is mounted to rock in bearings 41 on the base 1and is provided with a. crank %2 connected by a pitman 43 with the auxiliary leaf 38, there being a buffer 44 on the base 1, wherewith thepivotally connected ing studs 51 slidably mounted in the leaf 38 andprovided with nuts 52 cooperating with the outer surface of the saidleaf. Compression springs 53 surround the studs 51 and abut against theleaf 38 and against the back plate 50, the springs serving to advancethe back plate. The back plate is supplied along its opposite edges withflanges 54: and The numeral 5% marks a presser head supplied on onesurface with a pad 5'? and carrying, upon its opposite surface, a plate58 having fingers 59 adapted to be received raaaaoa in openin s in theflange of the back plate 50. Late ics 60 are mounted to swing onthepresser head 56 and are united by a connecting strip 62, one latch 60having a handle 61.

The finger 55) may be inserted through the flange 55, the latches (50being operated through the instrumcntality of the handle 64) and theconnecting strip 6:2. both latches engaging the back plate 50 as clearlyshown in Figure at, the latches engaging the back plate adjacent to theflange 5a, against. which one edge of the plate 58 abuts. The presserhead 56 is connected releasably with the plate 50 and is yieldinglysupported, by the springs 53, with respect to the leaf.

The sensitized paper is held. by a means to be described hereinafter, onthe pad 57 of the presser head 56, and the sensitized paper may bepressed against the mask 10 by depressing the free end of the lever 47and engaging the lever with the latch 49, a rocking movement beingimparted by the crank lfrto the shaft 40, the crank 42 and the pitman 43swinging the leaves 36 and 38 until the prcsser head 56 exercises itsfunction as hereinbefore explained, the springs 53 serving to supportthe presser head yieldingly.

A clamp plate 65 slides in contact with one edge of the prcsser head 56and is provided with a flange 66 cooperating with the working surface ofthe presser head, that is. with the pad 5?.to hold the papersthereagainst. The clamp plate 65 has inclined slots 37 receiving guidepins 68 mounted in the edge of the presser head 56. A shaft 69 ismounted to rock in bearings 70 on the outer surface of the prcsser head56 and is provided with an intermediate finger 71 adapted to cooperatewith a cam 72 carried by the leaf 36. The shaftfiS has a crank arm "Iiiconnected by a link 7% with the clamp L i. .i spring is connected at oneend presser head 56 and is connected at its other end with the finger71. The spring 75 tends to rock the shaft 69 in the bearings ill. thecrank arm 73 and the link 74: drawing the clamp plate 65 endwise. atransverse movement being imparted thereto by the slots 65 and the pins(38. the flange 66 thus being made to cooperate with the pad 57 and tohold one edge of the sensitized paper.

In operation. after the printing has been completed. and after the leaf38 has been swung downwardly and 'backwardly from the position of Figure1, the finger 71 cooperates with the cam 72 and rocks the shaft otbthearm 73 and the link 74 operating the clamp plate so that its flange 66no longer grips the paper. The paper, therefore, is released when theleaves 38 and 36 swung backwardly by the operation of the lever +17 andattendant parts. The guide plate 76 may extend along one edge of thepresser head 56, at right angles to the clamp plate 56, the guide plate76 being in the form of an angle member if desired. One flange of theclamp plate "7 slides, as indicated in Figure 5. between thecorresponding flange of the guide plate 76 and the presser head 56.securing elements 78 connecting the guide plate 76 with the presserhead, and one flange of the clamp plate being slidably mounted on thesecuring elements. hen the leaf 38 and the presser head 56 are ad vancedtoward the negative holder the transverse flange of the clamp plate 77cooperates with the pad 57 to aid in holding the paper; the clamp plate'77 being released, as soon as the presser head 56 and the leaf 38 areswung backwardly away from the negative holder 2.

A casing 79 is connected with the base 1 and the negative holder 2, thebase and the negative holder constituting, to all intents and purposes,a part of the casing. Adjacent its upper edge and upon its sides, thecasing 79 is provided with ventilating openings 80 which also serve topermit the operator to look into the interior of the casing. The casingT9 includes a top 81 to which a lid 82 is hinged as shown at 83, the lidhaving an extension 8% connected thereto by hinges the extension 8stforming an inclined front for the casing, to the rear and above thenegative holder :2. Guides 86 are carried by the lid 82 and in theguides 86, a slide 67 is mounted for reciprocation. A shaft 68 isjournaled in the lid 62 and is provided .with an exposed. handle 89. Theinner end of the shaft 88 terminates in an arm 90 having a finger 91mounted to move in a slot 93 formed in the slide 87. The guide 87carries lamps 92.

It will be understood that when the shaft- 88 is operated by means ofthe handle the slide 87 may be moved forvv'arlly and backwardly, so asto position the lamps 92 properly, with respect to the negative and thesensitized paper.

A shaft 9 extends transversely of the casing 79 and is journaledtherein. Vithin the casing 79, a shaft 9st carries a frame supporting aplate or screen 96, made of frosted glass or any other suitablematerial. Externally of the casing 79 the shaft 94 carries a. handle 97.

By means of the handle 97, the shaft 94 may be rotated, the frame 95swinging the plate or screen 96 with respect to the lamps 92, so as todiffuse the light with respect to the negative.

The extension 84 of the lid 82 is irovided with inwardly projectingflanges 98 to which. a screen 99 is pivoted or hinged as indicated at100. The screen may be swung backwardly and upwardly against theextension 841, as shown in Figure 9, and be held in that position byfrictional engagement with projections 101 on the flanges 98.

If desired, the screen or-shield 99 may be swung downwardly into thedotted line po' sition of Figure 9 and when thus disposed, serves toprotect the eyes of a person looking into the machine or watching theprinting operation. The shield 99 is of peculiar utility when a negativeis not wide enough to extend entirely across the opening 3 in the holder2.

A lamp 102 is mounted on the rear portion of the casing 79 and is incircuit by means of a conductor 103, with the lamps 9:2. In theconductor 103 is interposed a knife switch mounted on the lower portionof the negative holder 2. The knife switch as indicated in Figure 8 mayinclude a contact member 105 and a. pivotally mounted blade 106constrained by a spring 107 into open-circuit relation with respect tothe contact 105, the numeral 108 denoting a base in which a plunger 109slides, the plunger being adapted to cooperate with one end of the lever106. The plunger 109 extends through the negative holder 2 and isslidably mounted therein, the rear end of the plunger lying in the pathof the leaf 36, as shown best in- Figure 1 of the drawings.

\Vhen the leaf 36 is swung upwardly and forwardly, the leaf advances theplunger 109, the lever 106 is swung into engagement with the contact105, and thus the circuit, including the lamps 102 and 92 is closed. Assoon, however, as the leaf 36 is swung baclnvardly. the plunger 109 isreleased. and the lever 106, under the compulsion of the spring 107breaks contact with the member 105, and opens the lamp circuit. Thelamps, therefore, burn only so long as the leaves 36 and 38 and thepresser member 56 remain in advanced positions.

Having thus described the invention, what is claimed is 1. In a. deviceof the class described, a. base; a negative holder on the base; a mainleaf hinged to the base; a presser member cooperating with the negativeholder; means for connecting the presser member with the main leaf forhinged movement with respect to the main leaf; means for producingswinging movement of the main leaf with respect to the base and forproducing swinging movement of the presser member with respect to themain leaf; a paper clamp movable on the presser member; a cam on themain leaf; a shaft mounted to rock on the presser member and providedwith a tinger cooperating with the cam; and means for connecting theshaft operatively with the paper clamp.

2. In a device of the class described a negative holder; a shaftjournaled thereon and provided at its ends with cranks, one crank beingan operating crank; a resilient presser arm cooperating with the holderand carried by the shaft; and a latch mounted on the holder, the latchcooperating with the other crank to hold the presser arm in cooperatingrelation with respect to the holder.

3. In a device of the class described, a

casing including a hingedly mounted front member, and includingenegetive holder located below the front member; and a shield hinged tothe front member and adapted to he swung down into overlapping relationwith respect to the negative holder, the front member and the shieldhaving coopereting shield is swung parts serving to retain the shieldWhen the upwardly ewey from the negative holder.

In testimony that I claim the foregoing as my own, I have hereto atlixedmy signature 15 in the presence of two Witnesses.

MONTE WELSH.

Witnesses:

CHAS. H. KE'ioHUM, J. E, HARRIS.

